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Home >> Toyota >> 2015 >> Highlander XLE, AWD >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> SFI System [2GR-FE] - Diagnostic Codes - (Except Hybrid) (4 Of 5) >> SFI System >> DTC P0128: Thermostat [08/2014 - 11/2016] >> Typical Malfunction Thresholds

Typical Malfunction Thresholds

Duration that both of the following conditions are met 5 seconds or more
Estimated engine coolant temperature 75°C (167°F) or higher
Engine coolant temperature sensor output Less than 75°C (167°F)
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